Sample size for monitoring sirex populations and their natural enemies
Keyword(s):
The woodwasp Sirex noctilio Fabricius (Hymenoptera: Siricidae) was introduced in Brazil in 1988 and became the main pest in pine plantations. It has spread to about 1.000.000 ha, at different population levels, in the states of Rio Grande do Sul, Santa Catarina, Paraná, São Paulo and Minas Gerais. Control is done mainly by using a nematode, Deladenus siricidicola Bedding (Nematoda: Neothylenchidae). The evaluation of the efficiency of natural enemies has been difficult because there are no appropriate sampling systems. This study tested a hierarchical sampling system to define the sample size to monitor the S. noctilio population and the efficiency of their natural enemies, which was found to be perfectly adequate.
2000 ◽
Vol 20
(3)
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pp. 91-96
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2012 ◽
Vol 102
(2)
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pp. 227-238
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Keyword(s):
2007 ◽
Vol 42
(5)
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pp. 755-757
2009 ◽
Vol 43
(suppl 1)
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pp. 29-35
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1996 ◽
Vol 13
(1)
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pp. 1-26
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